JP3114360B2 - Contactless power supply equipment for mobile objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply system for a mobile body, and more particularly to a non-contact power supply system for a self-propelled transport vehicle that transports a load guided by a rail track.

[0002]

2. Description of the Related Art FIG.
This will be described with reference to FIG. 12 and FIG. The transporting vehicle body V as a moving body is composed of a driving trolley 1A, a driven trolley 1B, and an article transporting carrier 1C supported by these trolleys 1A and 1B, and a guide rail B for movably guiding the vehicle body V. Are provided.

The drive trolley 1A includes a traveling wheel 2 engaged with an upper portion of a guide rail B, a steady rest roller 3 contacting a lower portion of the guide rail B from both sides, and a current collecting unit D.
And the traveling wheels 2 are driven by an electric motor 4 with a speed reducer. Further, the driven trolley 1B includes a traveling wheel 5 which is engaged with an upper portion of the guide rail B, and a steadying roller 6 which is in contact with the lower portion of the guide rail B from both lateral sides.

The guide rail B is provided with a wheel guide 7 at an upper part thereof and a roller guide part 8 at a lower part thereof, and is supported by a support frame 9 connected to one lateral side in a suspended state from a ceiling or the like. An energizing rail unit U is attached to the other side of the guide rail B from the side to which the support frame 9 is attached. The guide rail B is made of a paramagnetic aluminum material.

The energizing rail unit U is provided for supplying electric power to the vehicle body V by three-phase alternating current and transmitting a travel control signal to the vehicle body V. A rail support frame 10 for supporting the energizing rails L in a parallel state is provided with a pair of upper and lower locking portions 11 provided on the guide rail B.
It is screwed in a state of being locked.

As shown in FIG. 13B, the energizing rail L is a rail body 12 made of a conductive material such as copper.
And a holder 13 formed of a non-conductive material such as a synthetic resin.
The holder 13 is provided with a pair of protective walls protruding from both lateral sides of the rail body 12 to the current collector side,
The collector contact surface of the rail body 12 is formed as a recessed surface that is located closer to the center in the rail width direction.

[0007] As shown in FIG.
Each of the energizing rails L includes a pair of current collectors 14.
A pair of current collectors 14 for one energizing rail L are located at an interval in the front-rear direction of the vehicle body V, and the four current collectors 14 at the front of the vehicle body are combined into one unit, and similarly, the four current collectors 14 at the rear of the vehicle body. The electronics 14 are grouped into one unit.

With the above structure, the vehicle body V of the moving body is supplied with power from the power supply rail L of the power supply rail unit U of the guide rail B via the current collector 14, and the traveling wheels are driven by the supplied electric motor 4 with a speed reducer. 2 is driven and moves while being guided by the guide rail B.

[0009]

However, in such a conventional power supply equipment for a mobile body, the rail main body of the power supply rail L is not provided.
Since the 12 and the current collector 14 are worn by contact with each other, maintenance is indispensable, and there is a problem that dust is generated. Furthermore, since the conductive material (rail main body 12) of the energizing rail L is exposed, there is a risk of electric shock, and furthermore, a spark is generated, so that it cannot be used in an explosion-proof area.

In order to solve such a problem, a non-contact power supply facility as shown in FIG. 14 has been proposed. The contactless power supply equipment shown in FIG. 14 includes a primary core 21 fixed to a charging station of a mobile unit and a mobile unit stopped at this station.
A secondary core 23 vertically provided below the bottom 22 is provided with a magnetic path facing the gap length g to transmit electric power.
That is, the primary core 21 provided in the charging station
When an AC current is applied to the coil 24 wound around the secondary coil 23, an electromotive force is generated in the coil 25 wound around the secondary core 23, and the AC current generated in the coil 25 passes through an AC-DC converter 26. To the battery 27, and the battery 27 is charged. The moving body 22 travels by driving the traveling wheels 28 using the battery 27 as a driving power source.

However, in such a configuration, the charging is not performed unless the charging station is stopped once, so that the working efficiency is poor, and such a problem can be solved by laying the primary core 21 along the traveling path. However, it was difficult to manufacture and was impossible in terms of cost. Furthermore, if there is a change in the gap length g, the primary-side inductance changes greatly, so that the primary-side current value changes greatly and the secondary-side voltage value changes greatly, causing overcurrent and overvoltage. However, in some cases, the protection device was activated and could not supply power. When a ferromagnetic material such as an iron material is present near the charging station, a magnetic path is formed between the ferromagnetic material and the primary side,
As a result, the inductance of the secondary side changes, so that power cannot be supplied as described above. Further, there is a problem that an overcurrent flows through the ferromagnetic material to generate heat, thereby increasing power consumption.

The present invention solves the above problems,
It is an object of the present invention to provide a non-contact power supply facility for a mobile body that can supply power safely, efficiently, and efficiently without contact.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a contactless power supply system for a moving object according to the present invention comprises a pair of high-frequency sine-wave currents flowing along a rail track for guiding the moving object. A non-contact power supply equipment for a moving body, in which a line is laid, and the moving body resonates at the frequency of the line and an electromotive force is generated, wherein the seams of the rail tracks are respectively moved in the moving direction of the moving body. Cut along the stairs along the line
, And the line is formed in a loop shape.

[0014]

According to the configuration of the present invention, the electromotive force is generated in the coil, so that the moving body is supplied with power in a non-contact manner even while traveling, and travels while being guided by the rail track. Also, the joints of the rail tracks are alternately cut out and combined along the moving direction of the moving body, and a pair of lines is provided at each joint.
One of the lines is folded back and connected to the other line, and the line is formed in a loop, so that the joint of the rail track
In the above, a magnetic path is formed between at least one of the lines and the coil, so that a depleted portion of the magnetic path is prevented from being generated at the joint of the rail tracks, so that power is reliably supplied.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those of the conventional example shown in FIGS. 12 and 13 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a side view of the contactless power supply equipment for a moving object according to the present invention, and FIG. 2 is a partial sectional front view of the moving body of the contactless power supply equipment for a moving object according to the present invention. In the non-contact power supply equipment for a moving body according to the present invention, the guide rail B is provided with a guide line unit X instead of the conventional energizing rail unit U, and the vehicle body V is provided with a pickup unit instead of the conventional collector unit D. P and a power supply device M are further provided.

The guide line unit X is provided with a bracket 32 having a pair of upper and lower hangers 31 vertically projecting at predetermined intervals along the guide rail B on one lateral side of the guide rail B. At the end, a resin duct 33 is stretched along the guide rail B, and each duct 33 is provided with a loop-shaped induction line 34 having a starting end connected to the power supply device M and a terminating end connected in a different direction of conduction. It is laid and configured. The routing of the guide line 34 is shown in FIG. After the guide rail B incorporating the guide line unit X is installed at the site, the guide lines 34 are connected to each other by crimp terminals 34A to form a loop. The guide line 34 is formed by covering an insulated stranded wire (hereinafter referred to as a litz wire) formed by collecting insulated thin wires with an insulator, for example, a resin material.

As shown in FIG. 4, the pickup unit P forms a pickup coil 36 by winding the above-mentioned litz wire of, for example, 10 to 20 turns around an H-shaped ferrite 35, and forms the pickup coil 36 on the vehicle body V side of the ferrite 35. Ferrite plate 37 on side
And the pickup unit P
The ferrite 35 is mounted on the vehicle body V such that the center of the ferrite 35 is located substantially at the center of the pair of ducts 33 of the guide line unit X and perpendicular to the guide rail B. When an electric current is applied (alternating current) to the induction line 34, an electromotive force is generated in the pickup coil 36.

As shown in FIGS. 3 and 5, the guide rails B made of aluminum are alternately cut and combined along the moving direction of the vehicle body V at the joints, and are formed of iron. The rail connection plate 38 and the bolt 39 are used for connection. The rail connection plate 38 and the bolt 39 are covered by a plate 40 made of an aluminum material from above the bracket 32. The cover of the paramagnetic plate 40 allows the ferromagnetic rail connection plate 38 and the bolt 39 to be connected to the induction line.
34 and pickup coil of pickup unit P
A magnetic path is prevented from being formed between the rail 36 and the coil 36, so that the inductance of the pickup coil 36 is prevented from changing, and an overcurrent flows through the rail connection plate 38 and the bolt 39 to generate heat and consume heat. Is prevented.

At the joint of the guide rail B, the upper and lower ducts 33 at the end of the guide rail B are removed, and the dielectric line 34 is provided at the end of the guide rail B with a through hole 40.
As shown in FIG. 3, it is folded back through A to form a loop. In this way, by alternately notching the guide rails B, an electromotive force can be generated in the pickup coil 36 from at least one of the guide lines 34,
Power can be supplied reliably. As shown in FIGS. 6 and 7, when the guide rail B is simply connected, and the guide line 34 is fixed on the bracket 32 by the fixing member 32A to take a loop, the guide line 34 is formed at right angles by its thickness and rigidity. Because of the inability to bend, a depletion point in the magnetic path occurs at the joint, weakening the coupling between the guide line 34 and the pickup coil 36, and causing the pickup coil 36 to move when the vehicle body V moves between the guide rails B. Power drops significantly.

The circuit configuration of the power supply device M and the vehicle body (moving body) V will be described with reference to the circuit diagram of FIG. The power supply M is
AC 200 V three-phase AC power supply 41, converter 42, sine wave resonant inverter 43, and transistor 44 for overcurrent protection
And a diode 45. The converter 42 is a diode 46 for full-wave rectification and a coil forming a filter.
The sine wave resonant inverter 43 comprises a capacitor 47, a capacitor 48, a resistor 49, and a transistor 50 for short-circuiting the resistor 49.
Includes transistors 51 and 52 driven by rectangular wave signals alternately oscillated as shown in the figure, a current limiting coil 53, a current supplying coil 54 connected to the transistors 51 and 52, It comprises an induction line 34 and a capacitor 55 forming a parallel resonance circuit. Note that the transistor control device is omitted.

The vehicle body V has a capacitor 56 constituting a resonance circuit that resonates at a frequency (set value) of the pickup coil 36 and the induction line 34 in parallel with the pickup coil 36.
And a rectifying diode 57 is connected in parallel with the capacitor 56 of the resonance circuit.
A stabilized power supply circuit 58 for controlling the output of 57 to a predetermined voltage is connected, and a load such as an inverter
The motor 4 is connected via 63. The stabilized power supply circuit 58 includes a current limiting coil 59, an output adjusting transistor 60, a diode 61 and a capacitor 62 forming a filter. Note that the transistor control device is omitted.

The operation of the power supply device M, the guide line 34 and the vehicle body V will be described. First, AC 200 V three-phase AC output from the AC power supply 41 is converted into DC by the converter 42,
For example, it is converted into a 10 kHz sine wave and supplied to the induction line 34. Due to the magnetic flux generated in the induction line 34, an electromotive force is generated in the pickup coil 36 of the vehicle body V located on the guide rail B resonating at the frequency of the induction line 34, and the alternating current generated by the electromotive force is generated by the diode 57. Rectified,
The stabilizing power supply circuit 58 regulates the voltage to a predetermined voltage, and supplies the regulated voltage to the electric motor 4 with a speed reducer via the inverter 63. The powered motor 4 drives the traveling wheels 2. It is guided by the guide rail B and moves.

As described above, power can be supplied to the vehicle body V without contact.
Therefore, wear of the current-carrying rail L,
Can be eliminated and maintenance free.
Can be manifested. Also, the length of the guide line 34 is
Length of coil 36 and length of rail connection plate 38
Is much longer than
Pickup coil 36 length is 10 ~ 15c for 100m
m, the length of the rail connection plate 38 is about 50 cm
Therefore, the primary inductance of the induction line 34 is almost constant.
That the sine wave resonant inverter 43 is used.
Therefore, a substantially constant large current value is applied to the induction line 34 at a high frequency.
The primary current of sine wave can flow and
The secondary side of the coil 36 forms a resonance circuit,
The bar connects the rail connection plate 38 and bolt 39
Of the pickup coil 36 even at the
The change in the conductance is prevented, and the tuning frequency is
As shown in FIG.
Frequency f_oAnd a large voltage v on the secondary side (1000 to 20 in the figure).
00V) occurs between the induction line 34 and the pickup coil 36.
Even if the gap length of
Even if it fluctuates, the resonance frequency on the secondary side
Even if the frequency fluctuates slightly, the frequency f₁~ F _TwoIn the range
Generates a secondary voltage exceeding a predetermined value (300 V in the figure)
Supply large power in a stable manner.
Can be. Therefore, the gap length should be roughly adjusted.
In addition, workability is improved, and manufacturing can be facilitated.
In addition, the cover of the plate 40 allows the rail connection plate
38 and bolt 39 generate heat to prevent heat consumption.
As a result, power consumption is suppressed, and power can be efficiently supplied.
Also, by alternately notching the guide rails B,
Power can be supplied from at least one induction line 34, and the joint
Depletion of the magnetic path occurs at
The coupling between the coils 36 is weakened, and the vehicle V
When moving between B, start-up generated in the pickup coil 36
It is possible to prevent the power from decreasing. further,
Eliminates the need for a core on the primary side, making it easier and less costly
Roads can be laid.

Further, the guide line 34 and the pickup coil 36
The use of litz wire covered with an insulator eliminates the exposure of conductive parts and enhances safety, and eliminates sparks, eliminating dangers such as fire and also used in explosion-proof areas. It is possible to do. Furthermore, since a sine wave is supplied to the induction line 34, no harmonic is generated, and the generation of radio noise can be eliminated.

In this embodiment, the two guide lines 34 are laid on the guide rail B. However, if the two guide lines 34 cannot be laid on the guide rail B, only one of the guide lines 34 is used. A configuration may be adopted in which the pickup coil 36 is laid along the guide rail B, the other guide line 34 passes through another path, and the pickup coil 36 moves in proximity to only one guide line 34. Further, by laying two or more guide lines 34 on the guide rail B, the power can be increased.

In this embodiment, the vehicle body V that moves in the left-right direction is described. However, the vehicle body (moving body) that moves in the vertical direction along the rail track also moves by being guided by the guide path. The present invention can be similarly applied to a moving body, and similar effects can be expected.

In this embodiment, the ferromagnetic rail connection plate 38 and the bolt 39 are covered by the paramagnetic plate 40 to prevent the magnetic path from being changed. However, as shown in FIG. In the case of a guide rail B 'in which the rail itself is formed of a ferromagnetic material such as an iron material, and a groove-shaped wheel guide portion 7' is formed in an upper portion and a groove-shaped roller guide portion 8 'is formed in a lower portion, the guide line 34 is laid. The entire side portion is covered with a plate 40 'made of a paramagnetic material such as aluminum material or a diamagnetic material such as copper, so that a change in magnetic path can be prevented. Generally, induction lines
If there is a ferromagnetic material in the vicinity of 34 or the pickup coil 36, similarly, a magnetic path change is prevented by covering with a magnetic path changing member made of a paramagnetic material such as aluminum or a diamagnetic material such as copper. can do.

In this embodiment, power is supplied by one power supply device M. However, as shown in FIG.
) Power supply device M ′. At this time, the guide rails B are cut off at the joints of the guide rails B and the guide lines 34 and 34 'are folded back, so that the guide lines 34 and 34' can be electrically separated from each other. Can be prevented. In addition,
In the configurations shown in FIGS. 6 and 7, the guide lines 34 and 34 'have to be brought close to each other, so that they cannot be electrically separated.

[0030]

As described above, according to the present invention, an electromotive force is generated in the coil, and the moving body is supplied with power in a non-contact manner even while traveling, so that the current-carrying rail is worn and dusts are reduced. Can be eliminated, and maintenance-free operation can be realized. In addition, the joints of the rail tracks are alternately cut out along the moving direction of the moving body and combined, and one of the pair of lines is connected at each joint.
Folded and connected to the other line, by forming the line in a loop, it can also form a magnetic path between one line and the coil and less <br/> at a joint of the rail track, the magnetic path at the joint of the rail track Depletion point can be prevented,
Power can be supplied reliably.

[Brief description of the drawings]

FIG. 1 is a side view of a non-contact power supply facility for a mobile object according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view of a non-contact power supply facility of the mobile object.

FIG. 3 is a drawing of a guide line of a non-contact power supply facility of the mobile object.

FIG. 4 is a front view and a side view of a pickup coil of the contactless power supply equipment of the moving object.

FIG. 5 is a front view and a side view of a joint part of a guide rail of the contactless power supply equipment of the moving body.

FIG. 6 is a drawing of a guide line of a non-contact power supply facility of the mobile object.

FIG. 7 is a front view and a side view of a joint portion of a guide rail of the contactless power supply equipment of the moving body.

FIG. 8 is a circuit configuration diagram of a non-contact power supply facility of the moving body.

FIG. 9 is a secondary frequency-electromotive force characteristic diagram of the contactless power supply equipment of the mobile object.

FIG. 10 is a side view of a guide rail of a contactless power supply equipment according to another embodiment of the present invention.

FIG. 11 is a drawing of a guide line of a wireless power supply system according to another embodiment of the present invention.

FIG. 12 is a side view of a conventional moving body and a power supply device.

FIG. 13 is a partial cross-sectional front view of a conventional moving body and a power supply device.

[Fig. 14] Fig. 14 is a configuration diagram of a conventional wireless power transfer facility for a mobile object.

[Explanation of symbols]

 V Car body B Guide rail X Guidance line unit P Pickup unit M Power supply 33 Duct 34 Guidance line 36 Pickup coil 38 Rail connection plate (magnetic material) 39 Bolt 40, 40 'plate (magnetic path changing member) 43 Sine wave resonance Inverter 55 Capacitor forming resonance circuit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60L 5/00 B60M 7/00 H02J 17/00 B65G 43/00

Claims (1)

(57) [Claims] 1. Along a rail track for guiding a moving body,
A non-contact power supply equipment for a moving body, in which a pair of lines for flowing a high-frequency sine wave current is laid, and the moving body is provided with a coil that resonates at a frequency of the line and generates an electromotive force, wherein the rail track joints Are alternately cut out along the moving direction of the moving body and combined, and at this joint, one line is turned back and connected to the other line
And a non-contact power supply equipment for a mobile body , wherein the line is formed in a loop shape.